Ensure your tires are always at the optimal pressure with our tire pressure monitoring caps. These caps replace your standard valve caps and provide -coded indicator that shows the current pressure status. This allows you to quickly and easily check your tire pressure before every drive, helping to prevent accidents and improve your vehicle's performance. The durable design ensures they will last through all driving conditions. Features - Color: Assorted Color -Material:Copper, plastic -Size:7.00X2.50X1.00cm/2.75X0.98X0.39in -Size:2.30X1.10X1.10cm/0.90X0.43X0.43in -Size:1.30X1.20X1.00cm/0.51X0.47X0.39in - tire pressure: the tire pressure warning cap provides tire pressure monitoring, ensuring you are always informed for safe driving -Prevent excessive wear: the visual tire pressure monitoring cap detects abnormal tire pressure early, preventing excessive wear and extending tire life -Easy installation: easily install the tire pressure warning cap on the tire valve without the need for professional tools, offering a convenient and quick setup -Wide vehicle compatibility: designed to fit various vehicles including private cars, , and offroad vehicles, the visual tire pressure monitoring cap offers wide compatibility -Fuel efficiency improvement: maintaining proper tire pressure reduces rolling resistance, lowers fuel consumption, and saves on fuel costs, improving overall fuel efficiency Package list: 4pcs x tire pressure monitor (4 caps + 4 nuts + 1 wrench)